powerpc/85xx: Add the workaround for erratum CPC-A003 (enable on P4080)

CoreNet Platform Cache single-bit data error scrubbing will cause data
corruption.  Disable the feature to workaround the issue.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>

diff --git a/arch/powerpc/cpu/mpc85xx/cmd_errata.c b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
index ae6af4f..bf70d2d 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cmd_errata.c
+++ b/arch/powerpc/cpu/mpc85xx/cmd_errata.c
@@ -62,6 +62,9 @@ static int do_errata(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
        puts("Work-around for Erratum CPC-A002 enabled\n");
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
+       puts("Work-around for Erratum CPC-A003 enabled\n");
+#endif
 
        return 0;
 }

diff --git a/arch/powerpc/cpu/mpc85xx/cpu_init.c b/arch/powerpc/cpu/mpc85xx/cpu_init.c
index c822d87..8ece970 100644 (file)
--- a/arch/powerpc/cpu/mpc85xx/cpu_init.c
+++ b/arch/powerpc/cpu/mpc85xx/cpu_init.c
@@ -145,6 +145,9 @@ static void enable_cpc(void)
 #ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A002
                setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_TAG_ECC_SCRUB_DIS);
 #endif
+#ifdef CONFIG_SYS_FSL_ERRATUM_CPC_A003
+               setbits_be32(&cpc->cpchdbcr0, CPC_HDBCR0_DATA_ECC_SCRUB_DIS);
+#endif
 
                out_be32(&cpc->cpccsr0, CPC_CSR0_CE | CPC_CSR0_PE);
                /* Read back to sync write */

diff --git a/arch/powerpc/include/asm/immap_85xx.h b/arch/powerpc/include/asm/immap_85xx.h
index 6b19ee8..b96dec7 100644 (file)
--- a/arch/powerpc/include/asm/immap_85xx.h
+++ b/arch/powerpc/include/asm/immap_85xx.h
@@ -1620,6 +1620,7 @@ typedef struct cpc_corenet {
 #define        CPC_ERRDIS_TMHITDIS     0x00000080      /* multi-way hit disable */
 #define CPC_HDBCR0_CDQ_SPEC_DIS        0x08000000
 #define CPC_HDBCR0_TAG_ECC_SCRUB_DIS   0x01000000
+#define CPC_HDBCR0_DATA_ECC_SCRUB_DIS  0x00400000
 #endif /* CONFIG_SYS_FSL_CPC */
 
 /* Global Utilities Block */

diff --git a/include/configs/P4080DS.h b/include/configs/P4080DS.h
index 950c8bc..c8f542e 100644 (file)
--- a/include/configs/P4080DS.h
+++ b/include/configs/P4080DS.h
@@ -41,6 +41,7 @@
 
 #define CONFIG_SYS_P4080_ERRATUM_CPU22
 #define CONFIG_SYS_FSL_ERRATUM_CPC_A002
+#define CONFIG_SYS_FSL_ERRATUM_CPC_A003
 #define CONFIG_SYS_P4080_ERRATUM_SERDES8
 
 #include "corenet_ds.h"